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FIG 4. A, Low magnification view of the tongue mass (x40) shows ill-defined infiltrative solid tumor. Tongue tissue, including muscle and salivary gland, is noted inferiorly.
B, High-magnification view of the tongue mass (x200) shows epithelial cells and Hassall's corpuscles. The tumor is more aggressive than primary neck mass and shows some mitosis (arrowheads).
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